Men of U.S. 377th Air Police Security Squadron and their dogs arrive for patrol at Tan Son Nhut Air Base in Vietnam.

Activities of USAF (United States Air Forces) 377th Air Police Security Squadron at Tan Son Nhut Air Base in Vietnam during the Vietnam War. Guards lift their dogs into a pick up truck. The truck pulls away and arrives in front of U.S. Air Force C-123B Provider transport aircraft. A guard and a dog get off the truck, go to their post where a different collar is put on the dog and muzzle is removed. Another guard and his dog get off truck at a perimeter fence post.